Human P selectin glycoprotein ligand 1 ELISA Kit | PSGL 1 elisa kit
Human P selectin glycoprotein ligand 1 ELISA Kit
Principle of the Assay: PSGL1 ELISA kit applies the competitive enzyme immunoassay technique utilizing an anti-PSGL1 antibody and an PSGL1-HRP conjugate. The assay sample and buffer are incubated together with PSGL1-HRP conjugate in pre-coated plate for one hour. After the incubation period, the wells are decanted and washed five times. The wells are then incubated with a substrate for HRP enzyme. The product of the enzyme-substrate reaction forms a blue colored complex. Finally, a stop solution is added to stop the reaction, which will then turn the solution yellow. The intensity of color is measured spectrophotometrically at 450nm in a microplate reader. The intensity of the color is inversely proportional to the PSGL1 concentration since PSGL1 from samples and PSGL1-HRP conjugate compete for the anti-PSGL1 antibody binding site. Since the number of sites is limited, as more sites are occupied by PSGL1 from the sample, fewer sites are left to bind PSGL1-HRP conjugate. A standard curve is plotted relating the intensity of the color (O.D.) to the concentration of standards. The PSGL1 concentration in each sample is interpolated from this standard curve.
NCBI and Uniprot Product Information
NCBI Description
This gene encodes a glycoprotein that functions as a high affinity counter-receptor for the cell adhesion molecules P-, E- and L- selectin expressed on myeloid cells and stimulated T lymphocytes. As such, this protein plays a critical role in leukocyte trafficking during inflammation by tethering of leukocytes to activated platelets or endothelia expressing selectins. This protein requires two post-translational modifications, tyrosine sulfation and the addition of the sialyl Lewis x tetrasaccharide (sLex) to its O-linked glycans, for its high-affinity binding activity. Aberrant expression of this gene and polymorphisms in this gene are associated with defects in the innate and adaptive immune response. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Apr 2011]
Uniprot Description
SELPLG: A SLe(x)-type glycan, which through high affinity, calcium-dependent interactions with E-, P- and L-selectins, mediates rapid rolling of leukocytes over vascular surfaces during the initial steps in inflammation. PSGL1 is critical for the initial leukocyte capture.
Protein type: Membrane protein, integral
Chromosomal Location of Human Ortholog: 12q24
Cellular Component: membrane; integral to plasma membrane; plasma membrane; integral to membrane
Molecular Function: protein binding; receptor binding
Biological Process: blood coagulation; leukocyte tethering or rolling; cell adhesion; leukocyte migration; leukocyte adhesive activation